Stick an auth token in aws credentials

awsmfa () {
    # Remove the old [default] section
    sed -i.bak '/^\[default\]/,/# End of \[default\]/d' ~/.aws/credentials
    # Get new token && append to credentials
    aws sts get-session-token \
        --serial-number arn:aws:iam::769885837224:mfa/allen.luce \
        --token-code `otp promethean-aws` \
        --duration-seconds 129600 \
        --profile mfa | \
    jq -r '.Credentials
        | "[default]",
        "aws_access_key_id = \(.AccessKeyId)",
        "aws_secret_access_key = \(.SecretAccessKey)",
        "aws_session_token = \(.SessionToken)",
        "# End of [default]"' >> ~/.aws/credentials
}